It proved so much fun that Barrichello couldn't tear himself away after the scheduled two days, and he returned for a third on Wednesday. With Viso also at Sebring for the day, Barrichello was time-sharing Kanaan's #11 KV Racing Technology car.
Ahead of the first day of activity on track at Sebring International Raceway with Jimmy Vasser's team, Barrichello had joked "I just hope I don't break anything for Jimmy ... Obviously you don't want to put it in the wall!" but in fact it was Tony Kanaan who had the first incident on Monday when he tore off the front wing after his carbon disc brakes overheated.
Barrichello's familiarity with F1's steering-wheel based gear controls meant that he eased away from the pit box without a problem on his very first attempt. Lacking the same experience with the system, Kanaan stalled the car when it came to his initial turn. It showed how much Barrichello's expertise in F1 could bring to KV Racing Technology and to IndyCar in general, if he did decide to make the transition.
While no formal timings were released from the session, it's thought that Kanaan led the way with a low-53s lap early on Monday morning, which Barrichello matched by the end of the day. That was refined to 53.0s on the second day, a match for the efforts of reigning champion Dario Franchitti in the Ganassi Dallara-Honda.
Driving Andretti Autosport's Dallara-Chevrolet, Ryan Hunter-Reay put in the fastest lap of the two day test session with a time in the low 52s on the 1.8-mile, 10-turn short road course, while Hunter-Reay's new team mate James Hinchcliffe posted a time one tenth of a second off Barrichello's fastest lap.
Penske trio Ryan Briscoe, Helio Castroneves and Will Power were also present on Monday, as was Panther Racing's JR Hildebrand.
Lotus were also in attendance at Sebring, with Oriol Servia scheduled to put the manufacturer's development car through its paces. But Lotus had a more troubled time of it than they did in their first round of tests with Simona de Silvestro earlier in January: the twin-turbo V6 test engine was late getting through customs and developed a leak during its shakedown lap, meaning that it lost all of Monday's track time. Even so, Servia was able to get the car down to a round 54s lap on the Tuesday.
Lotus were not alone to have teething problems, with Ganassi's Graham Rahal and AJ Foyt Racing's Mike Conway both experiencing problems with the Honda engine during their Tuesday activities. Franchitti was unaffected by such issues, and Justin Wilson also seemed glitch-free in his first outing in Dale Coyne Racing's Honda-powered car.